Angel Food Cake. A fat-free, highly aerated and fluffy white cake (q.v.) whose basic ingredients are whipped egg whites (q.v.), sugar (q.v.), and flour (q.v.), to which are added minor amounts of salt (q.v.), cream of tartar (q.v.), and flavoring, such as vanilla (q.v.). The cake is usually baked in a tube pan that is generally referred to as an angel food pan (q.v.).